EP1511088A4 - Light emitting element drive device and mobile device using the same - Google Patents

Light emitting element drive device and mobile device using the same

Info

Publication number
EP1511088A4
EP1511088A4 EP03730692A EP03730692A EP1511088A4 EP 1511088 A4 EP1511088 A4 EP 1511088A4 EP 03730692 A EP03730692 A EP 03730692A EP 03730692 A EP03730692 A EP 03730692A EP 1511088 A4 EP1511088 A4 EP 1511088A4
Authority
EP
European Patent Office
Prior art keywords
led
drive
light emission
emitting element
light emitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03730692A
Other languages
German (de)
French (fr)
Other versions
EP1511088A1 (en
EP1511088B1 (en
Inventor
Kazuhito Tsuchida
Junji Saito
Kazuo Sudo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Sony Ericsson Mobile Communications Japan Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp, Sony Ericsson Mobile Communications Japan Inc filed Critical Sony Corp
Publication of EP1511088A1 publication Critical patent/EP1511088A1/en
Publication of EP1511088A4 publication Critical patent/EP1511088A4/en
Application granted granted Critical
Publication of EP1511088B1 publication Critical patent/EP1511088B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/16—Controlling the light source by timing means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Led Devices (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Control Of El Displays (AREA)
  • Telephone Function (AREA)

Abstract

A light emitting element drive device capable of always outputting the lowest voltage satisfying the drive condition and having a high light emission efficiency and a low power loss. A mobile device using it is also disclosed. LED’s (20-1 to 20-n) requiring different voltage for light emission are connected in parallel and there is provided one or more LED drive devices (10) for driving the LED’s. The LED drive devices (10) include drive circuits (13-1 to 13-n) connected to the corresponding LED’s so as to current-drive the corresponding LED’s with the luminance based on the set value and power supply circuits (14, 15) for judging the drive voltage value required for the highest light emission among one ore more LED’s driven for light emission and supplying the drive voltage of at least judged value to a plurality of LED’s in parallel.
EP03730692A 2002-05-31 2003-05-29 Light emitting element drive device and mobile device using the same Expired - Lifetime EP1511088B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002160536 2002-05-31
JP2002160536A JP3745310B2 (en) 2002-05-31 2002-05-31 LIGHT EMITTING DEVICE DRIVE DEVICE AND PORTABLE DEVICE USING THE SAME
PCT/JP2003/006735 WO2003103061A1 (en) 2002-05-31 2003-05-29 Light emitting element drive device and mobile device using the same

Publications (3)

Publication Number Publication Date
EP1511088A1 EP1511088A1 (en) 2005-03-02
EP1511088A4 true EP1511088A4 (en) 2005-12-14
EP1511088B1 EP1511088B1 (en) 2009-11-04

Family

ID=29706550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03730692A Expired - Lifetime EP1511088B1 (en) 2002-05-31 2003-05-29 Light emitting element drive device and mobile device using the same

Country Status (7)

Country Link
US (7) US7365718B2 (en)
EP (1) EP1511088B1 (en)
JP (1) JP3745310B2 (en)
KR (1) KR100945205B1 (en)
CN (1) CN100570686C (en)
DE (1) DE60329914D1 (en)
WO (1) WO2003103061A1 (en)

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Also Published As

Publication number Publication date
WO2003103061A1 (en) 2003-12-11
US20080204381A1 (en) 2008-08-28
KR100945205B1 (en) 2010-03-03
JP2004006533A (en) 2004-01-08
US20050225515A1 (en) 2005-10-13
KR20050023263A (en) 2005-03-09
US20150359058A1 (en) 2015-12-10
US9148927B2 (en) 2015-09-29
US8941581B2 (en) 2015-01-27
JP3745310B2 (en) 2006-02-15
EP1511088A1 (en) 2005-03-02
EP1511088B1 (en) 2009-11-04
US20130033196A1 (en) 2013-02-07
US20140339997A1 (en) 2014-11-20
US9717124B2 (en) 2017-07-25
US8654059B2 (en) 2014-02-18
US7365718B2 (en) 2008-04-29
US20140078030A1 (en) 2014-03-20
CN100570686C (en) 2009-12-16
US8618745B2 (en) 2013-12-31
CN1656621A (en) 2005-08-17
US20140225522A1 (en) 2014-08-14
DE60329914D1 (en) 2009-12-17
US9041643B2 (en) 2015-05-26

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